2nd stage- Filter 2: Cation Exchanger-replace magnesium and calcium ions found in hard water with sodium ions,water softening,reduce nitrate and flouride from water,remove poisonous and heavy metal ions from solution, replacing them with more innocuous ions, such as sodium and potassium.

4th stage - Filter 4: Alkaline Activation - Boost activation,mineralization and activity of water which has several functions in health care and bacterium resistance. Improve drinking water taste and diminution of bad smell.Reduces the cluster size of the water molecules to increase absorption rate by our body. Good anti-oxidant source and reverse aging.Alkaline water helps to neutralize acids and remove toxin from our body.Ideally, drinking water should have a PH reading between 8 to 9.